Method and apparatus for precision roller spinning articles of ductile material, such as rolled steel and the like



1936. w. R. HARRISON I 2,062,415 METHOD AND APPARATUS FOR PRECISION ROLLER SPINNING ARTICLES OF DUCTILE MATERIAL, SUCH AS ROLLED .STEEL AND THE LIKE Filed July 26,1955 5 Sheets-Sheet l mill [/7 Y "mm O I 122- Wfifiariison WWW w 1936- w. R. HARRISON 2,062,415 METHOD AND APPARATUS FOR- PRECISIQN ROLLER SPINNING ARTICLES 0F DUCTILE MATERIAL, SUCH AS ROLLED STEEL AND THE LIKE ctr" if, fil

v amen 1M Harrison Dec. 1, 1936. I w R HARRISON 2,062,415 METHOD AND APPARATUS FOR PRECISION ROLLER SPINNING ARTICLES OF DUCTILE MATERIAL, SUCH AS' ROLLED STEEL AND THE LIKE Filed July 26, 1935 5 Sheets-Sheet 5 H M +1 I w 3 8 F M 1 1 w mN W W QM M a a. mw IH 0% Q N Q\% Q% h Q QNM I .QM r I ww NEW ER QRN N w I I. M 4Q 1 |1|FI. I. m $w ww H N E u E R NR RN Q QR 3 g 3 Q m g NR R w w in mm Rn Q R w M w NP: 3L Q N Dec. 1, 1936. w R HARRlsQN 2,062,415

, METHOD AND APPARATUS FOR PRECISION ROLLER SPINNING ARTICLES OF DUCTILE MATERIAL, SUCH AS ROLLED STEEL AND THE LIKE Filed July 26, 1935 5 Sheets-Sheet 4 W12. bar/"13m Q Gum/"M34 2,062,415 TICLES' E LIKE 5 Sheets-Sheet 5 HARRISON PRECISION ROLLER SPINNING AR SUCH AS ROLLED STEEL AND TH led July 26, 1935 Dec. 1, 1936.

METHOD AND APPARATUS FOR- OF DUCTILE MATERIAL, F1

Patented Dec. 1, 1936 METHOD AND APPARATUS FOR PRECISION ROLLER SPINNING ARTICLES OF DUCTILE MATERIAL, SUCH AS ROLLED STEEL AND THE William R. Harrison, Canton, Ohio, assignor to The Spun Steel Corporation, Canton, Ohio, a

corporation of Ohio Application July 26, 1935, Serial No. 33,210

12 Claims.

My invention relates to methods and apparatus for precision roller spinning articles such as V-grooved pulleys of ductile material, such as metal, and preferably rolled steel sheets or strips,

and which may be subject to blanking and pressing operations to partially form the same prior to I the roller spinning.

More particularly the present improvements are adapted for the manufacture of the V-grqov pulleys set forth in U. S. Letters Patent No. 1,680,061, of Reynold G. Nelson, issued August 7, 1928, for Spun metalmanufacture and product. Insuch pulleys, each has a" wheel disk and one or more relatively narrow and relatively deep outwardly opening V-grooves formed by flanges integral with the wheel disk.

Such pulleys may be manufactured by the methods and apparatus set forth in said U. S. Patent No. 1,680,061, its division U. S. Patent No.

' 1,728,002, issued September 10, 1929, or in my prior U. S. PatentNo. 1,828,464, issued October 20, 1931.

The method of roller spinning set forth in each of said prior patents generally includes rotating material to be spun, applying radial pressure to the rotating material, and applying an axially directed thrust to the rotating material during the application of the radial pressure.

In the prior R. G. Nelson Patents No. 1,690,061 and No. 1,728,002, the radial" pressure is applied by manually actuated non-yielding mechanical means, including a cross feed screw, and the axially directed thrust is applied by means of a piston actuated by the expansion of compressed air introduced intoa cylinder for the piston though a manuallycontrolled valve.

In my prior Patent No. 1,828,464 the axially directed thrust is likewise applied by'means of an axial thrust piston actuated by the expansion 40 of compressed air introduced into an axial thrust cylinder for the axial thrust-piston througha manually controlled valve; and also the radial pressure is applied bymeans of-a cross feed piston actuated by the expansion of compressed air introduced into a cross feed cylinder for the cross feed piston through another manually controlled valve. v 1 In the methodsand apparatus of each of said patents, the timing of the relative applications of the radial; pressure and the axial thrust is effected by the judgment of the operator who in each case manually operates the valve for the axial thrust piston, and also manually operates either the cross feed screw or the valve for the piston.

From the standpoint of preciiion manufacture in the mass production of V-pulleys intended for example as pulleys for the fans of automobile engines, manufacturing tolerances are very rigid,

and while the methods and apparatus of my said 5 prior Patent No. 1,828,464 provide. for a more uniform run of pulleys than do the methods and apparatus of said R. G. Nelson Patents No. 1,680,061 and No. 1,728,002, yet there is still some variation'in a run ofpulleys made by the methods, and apparatus of my said Patent No. 1,828,464, because of the variations possible in the timing of the relative applications of the radial pressure and the axial thrust. These variations may be very slight, and may only affect the cold rolled inner surface finish 01 the V-grooves, but as aforesaid the manufac- .turing standards set up for automotive V.-pul1eys make it very important that even slight diflerences in variations in a run of pulleys be obviated. 20

From another-standpoint when the radial pressure or the axially directed thrust is applied by means of a piston actuated by theexpansion of compressed air, successive movements of the piston require utilization of the energy of success e charges of compressed air introduced into thcylinder for the piston, which air charges after expansion are exhausted from the cylinder and passed through an air compressor and recom-' pressed, with a consequent relatively great cost for the required total volume of compressed air. for roller spinning runs of pulleys.

The objects of. the present improvements include the. provision of an improved method and apparatus for carrying out the improved method, and adapted for attaining a relatively high degree of uniformity ofrflnished product-in the precision roller spinning of articles of ductile mate rial such as V-groove pulleys of rblledsteel.

Further objects of the present im rovements include the provision of apparatus to er spinning in which the benefits of applying preferably the axially directed thrust through the medium of compressed air is attained without necessitating the use of successive expanding charges of compressed air requiring a power cost for thenecessary air compressor operation. 7

Further objects-of the improvements include the provision of an improved general and detail I arrangement of certain parts of the improved ap paratus so as to attain an improved m'o'de of operation for carrying out the improved method The foregoing and'other objects are attained by the methods; apparatus, parts, combinations, 0

and sub-combinations, which comprise the D1588", ent invention, and the nature of which is set forth in the following general statement, and preferred embodiments of which are set forth in the following description. and which are particularly and distinctly pointed out and set forth in the appended claims forming part hereof.

The nature of the improved method of the present invention may be stated in general terms as consisting of roller spinning an article of duc- -tile material by rotating the article about an axis, which may be termed the spinningaxis, applying upon the rotating article a moving axial thrust or compressive force in the direction of the spinning axis and opposed by a thrust or compressive force, and applying, a moving roller spinning pressure upon portions of the article between the compressive forces, the directions of motion of the moving compressive force and of" the moving roller spinning pressure being angular to each other, the moving roller spinning pressure being preferably radial with respect to the spinning axis, and the movements of the compressive force and the roller spinning pressure being simultaneous and automatically co-ordinated with respect to each other.

The nature of the improved apparatus of the present invention may be stated in general terms as including opposed rotatable die heads, means for rotating one of the die heads, means for moving one of the die heads towards and away from the other die head, a spinning roller operatively mounted 1; one side of the axis of rotation of the die heads and between the opposite end planes of the die heads atright angles to. the axis of rotation, means for moving the spinning roller towards and awayfrom the axis of rotation of the die heads and rolling position between the die heads, and means for operating the moving means for the die head and the moving means for the spinning roller in co-ordination with respect to each other.

By way of example, a preferred embodiment of the improved apparatus for carrying out the improved method is illustrated in the accom-' panying drawings forming part hereof, in which Figure l is a diagrammatic plan view of the complete improved apparatus including the improved spinning lathe and the associated com pressed air equipment;

Fig. 2, an enlarged fragmentary plan view of the improved apparatus, with portions broken away and illustrated in section;

Fig. 3, a longitudinal vertical sectional view thereof as on line 33, Fig. 2;

Fig. 4, a fragmentary plan sectional view thereof as on line 4-4, Fig. 3;.

Fig. 5, another fragmentary plan sectional view thereof as on line 5-5, Fig. 3;

Fig. 6, an. end elevation thereof looking in the direction of the arrows 6-6, Figs. 2 and 3; Fig. '7, a transverse sectional View thereof as on line 1-I, Figs. 2 and 3, the rough and finish spinning rollers and associated parts being both in retracted position, and portions being broken away to more clearly illustrate the cam actuated cross feed means for the spinning rollers;

,Fig il, a, .vi ew similar to Fig. 7 with the rough spinning;; 1;oller and associated parts in roller spinning position at the end of the cross feed stroke of the rough spinning roller and the finish spinning rcller and associated parts being still in retracted position ready to advance into spinningposition;

Fig. 9, aview similar to Figs. 7 and 8 withthe finish spinningroller and associated parts being in spinning positionafithe end of its cross feed stroke, and the rough spinning roller and associated parts being retracted; n Fig. 10, an enlarged fragmentary plan view illustrating the relative positions of the rough spinning roller at the end of its cross feed spinning stroke and the associated parts of theimproved spinning lathe, particularly the tail stock pa s: i Fig. 11, a view similar to Fig. 10 illustrating Similar numerals refer to similar parts throughout the drawings.

The improved roller spinning apparatus is indicated generally at If], andincludes animproved automatic roller spinning lathe indicated generally at H, and associated compressed air equipment indicated generallyat l2.

The improved automatic spinning lathe 'II includes a bed i3 supported by a head stock end leg frame i4 and a tail stock end leg frame It.

Spinning and drivinghead stock means indicated generally by iii are secured to the bed above the head stock end leg frame I and tail stock means indicated generally by I! are opertherelative positions of the several parts just as the finish spinning rolleris about to commence itscross feed spinning operation.

atively mounted in a novel manner on the bed able flnish spinning roller means indicated generally by iii are operatively mounted in a novel manner as is hereinafter set forth in detail.

The head stock means indicated generally by l6 includes a bearing frame 20 secured to the bed i3 and having longitudinally spaced bearing boxes 2| and 22 through which a main drive and spinning shaft 23 extends, and the shaft 23 is journalled in the bearing box 2| as illustrated by opposed ball thrust bearings 24 and 25, and

v the shaft 23 is journalled in the bearing box 22 as illustrated by a radial ball bearing 26.

The shaft 23 extends through the bearing box 2| towards thetail stock means l1, and is provided on its extremity opposite the tail stock means II with a spinning die head 21., v

Between the bearing boxes 2| and 22, the shaft 23 has a pulley 28 secured thereon, and the shaft 23 is driven by a motor 29 mounted on the frame l4, the'motor having a pulley 30, and a drive belt 3| passes over the pulleys 30 and 28,.and is driven by the motor pulley 30 and drives the pulley 28 and shaft 23.

A gear and clutch housing box 32 is secured to the outer end of the bearing box 2| and the shaft 23 extends into the interior compartment 33 of the housing box 32.

Within the compartment 33, the shaft 23 has operatively mounted thereon in a usual manner a clutch 34 and a worm 35, the worm 35 being journalled on the shaft, and the clutch including a member 36 longitudinally slidably keyed to the shaft for connection and disconnection with Y a member 31 secured for rotation with the worm 35. v

The shaft 23 is a horizontal shaft, and at one side thereof the housing box 32 has journalled 75 aoeaus with the worm 85.

On the lower end ofthe shaft 88 within another gear housing box 48,there is secured a worm 4i.

"The bed "has iournalled therein as by a double thrust ball bearing 42 at the tail stock "end and a radial ball bearing 48 at the head stock end, a longitudinal thrust. and cross feed drive shaft 44, the head stock end of which has secured thereon, a worm wheel 45 meshed with the worm 4i within the housing box 48.

Beneath the tail stock means l1,'the shaft 44 has secured thereon a tail stock carriage moving cylindric camindicated generally by 45, andthe shaft 44 extends beyond thetail stock end of the bed i8 and has secured thereon a cross feed drive gear 41 which is meshed with an idler gear 48 Journalled as illustrated on a stub shaft 48 mounted as illustrated on a bearing plate 58 at' 1 and 52 are journalled in the bearing bracket 55. I35

, The cam shaft 5| is operatively connected by cam, link, and lever cross feed means indicated generally by with the finish-spinning roller means l8, and the cam shaft 52 is operatively connected by cam, link, and lever cross feed means indicated generally by 51 with the rough spinning roller means l8.

The cam, link, and lever crossfeed means 55 include a lever 58 which. is, pivotally mounted intermediate its ends at 58-4 on a bearing bracket 58 which is secured to the bed i8 at the front or operator side. thereof indicated by F.

The finish spinning roller means include a base 88 having spaced parallel gibs 58-la and 58-ib extending cross-wise of the bed i8 and.

slidable in cross-wise extending gibbed ways '5Ia and Bi b provided in the top of the bed l3.

The upper end of the lever 58 is pivotally connected at 52 with one end of a stub link 88, the

other end of which is pivotally-connected at 54 with an ear 55 depending from the lower inner end of the base 88. 7

The other end of the lever 58 extends at the front side of and below the cam shaft'5l.

The bracket 55 pivotally mounts at 85 the upper end of a link 51, the lower end of which is pivotally connected at 88 with one end of a cross link -58, which extends below'the cam shaft 5|, and

- which at its other end is pivotally connected at 18 with the lower end of the lever 58.

As illustrated, the pivots -58i and 55 are horiz ontally spaced a distance equal to the horizontal distance between the pivots 18 and 58, and the spacing ofv the pivots 58-.-.-| and 18 is equal to the spacing of the pivots 8 5 and 58.

The lever 55 has a cam follower roller-1i journalled thereon opposite the cam shaft 5|, and

the cam shaft 5| has secured thereon a cross feed pressure cam 12 which operates against the roller 1i. g i

The link 51 has a cam follower roller 18 journalled thereon and the cam shaft 5i opposite the sleeve nut 88.

. 3 roller llhasacrossfeedreturncam 14 secured thereon which operates against the follower roller 18.

The cam, link, and lever cross feed means 51 are similar to the cross feed means 58, but include certain reversely or oppositely arranged members, and the cross feed means 51 operate in a reverse cycle to that of the cross feed means 58.

In order to clearly describe the operation of n the improved automatic spinning lathe H, it is desirable to further describe the cam, link, and lever cross feed means 51 in detail. as follows:

The cam link and lever cross feedmeans 51 in clude a lever 15 which is pivotally mounted intermediate its ends at 15 on a bearing bracket 11 which is secured to the bed l8 at the rear side thereof indicated by R.

The rough spinning roller means" include a base 18 having spaced parallel gibs 18-40. and 18--lb' extending'cross-wise of the bed l8 and slidable in the cross-wise extending gibbed ways 5ia and 5ib at the rear side of the bed. 7 The upper endof the lever "is pivotally connected at 18 with one end of a stub link 88, the other end of which is pivotally connected at ill with an ear 82 depending from the lower inner end of the base 18.

The other end of the lever 15 extends at the rear side of and below the camshaft 52.

The bracket 55 pivotally mounts at 88 the upper end of a link 84, the lower end of-which is pivotally connected at 85 with one end of a cross link 88, which extends below the cam shaft 52, and

which at its other end is pivotally connected at 81 with the lower end of the lever 15. n As illustrated, the pivots 88 and 18 are horizontally spaced a distance equal to the horizontal n 5 nalled thereon opposite the cam shaft 52,-and the cam shaft '52 has secured thereon across feed pressure cam 88 which operates against the roller 88. n

The .link 84 has a cam follower roller 88 Journalled thereon and the cam shaft 52 opposite the roller .88 has a cross feed return cam 8i secured thereon which operates against the follower rolladdition to the base 58, an intermediate adjusting and mounting plate 8 2 which is adjustably secured upon the'top of the base ,58 by bolt andslot means 88, and which is provided with adjusting meansindicated 'generallyby 84 for adjusting the position of the plate 82 on the base 58 cross-wise towards or away from the axis of rotation '85 of the spinning head 21 and shaft 28.

The adjusting means-84 as illustrated include a sleeve nut 85 depending from the bottom of the plate 82 and extending into a pocket 81 formed in the upper face of the base 88.

A shouldered .bolt 88 extends through suitable concentric bores provided in the base 88 on opposite sides of the pocket 81 and extending at The finish spinning roller means 18 include, in

right anglesto the vertical plane including the axis of rotation 85, and the bolt 88 has threads 88 formed thereon which, screw through the At its outer extremity the bolt 88 as illustrated has a squared head I88 whereby the bolt 88 may be turned by a wrench applied to the squared head I88, thus moving the plate 8 towards or away from the spinning axis 85. n

A bearing bracket I M is secured upon the top of e plate 02 preferably by cap screw means I02 nd key means I03 extending parallel with the axis 35 and fitting in oppositely opening longitudinal grooves formed in the top of the plate 32 and at the bottom of the bracket IOI.

The bracket I M has Journalled therein a finish spinning roller I04.

The rough spinning roller means I8 are generally similar to the finish spinning roller means I0, but include reversely arranged parts since the rough spinning roller means operate at the opposite side of the spinning axis of rotation 30.

The rough spinning roller means I3 has a rough spinning roller I Journalled in its bearing bracket I06.

The tail stock means indicated generally by I1 includes a carriage I01 having opposite gibs I03a and "1% extending longitudinally parallel with the spinning axis 85 and longitudinally slidable in longitudinally extending gibbed way means I08a and I09b provided in the upper surface of the tail stock end of the bed I3.

The carriage I01 has secured to its lower portion a cam follower bearing block IIO which Journals preferably by anti-friction bearing means as illustrated, a cam follower III which is rotatable about a vertical axislocated in the vertical plane passing through the spinning axis 00, and the cam follower III has a preferably conical head II2 which extends into a sloping walled cam groove II3 formed in the cylindric cam 43, as shown in Figs. 3 and 5.

The tail stock carriage I01 furthermore includesv at opposite ends thereof longitudinally spaced bearing portions H4 and. 5 having concentric and equal diameter bores formed therein and being coaxial with the spinning axis 95.

An externally cylindric tail stock piston rod guide and cylinder mounting sleeve H0 slidably extends through the bores of the bearing portions Ill and IIS of the carriage I01 and is provided with means for longitudinally adjusting its position with respect to the carriage I01, which as illustrated include an internally threaded sleeve II! which bears at opposite ends on end faces of the bearing portions Ill and H0 and which screws upon threads formed upon central portions of the sleeve IIO.

Slot and pin means H3 operatively interposed between the bearing portion Ill and the sleeve IIO prevent rotation of the sleeve H6, and accordingly rotation of the internally threaded adjusting sleeve II1 serves to move the externally threaded guide and mounting sleeve H0 towards or away from the spinningdie head 21.

As illustrated, the guide: and mounting sleeve IIO extends beyond opposite ends of the carriage I01 and the tail stock end of the sleeve H0 has secured thereon a cylinder II9 having an outer removable cylinder head I20.

A longitudinal thrust piston rod I2I slidably extends through the sleeve IIB into the bore I22 of the cylinder I I9, and the bore I22 of the cylinder IIO has slidably mounted therein a piston I23 which is secured therein to the end of the piston rod I2I.

The other end of thethrust piston rod I2I is provided as illustrated with ball bearing means I24 which rotatably mount a tail stock spinning die head I25.

In the normal operation of the improved automatic spinning lathe II, the clutch 34 is in connected position as shown in Fig. .2.

Link and lever means indicated generally by I20 are operativeiy associated with the clutch 34 for disengaging 1e clutch member 30 from the clutch member 31 and thus from driving connection with the worm 3!, so that when desired, the parts driven by the worm 30 may remain stationary even though the spinning shaft 23 is .rotating. The cross feed drive means for the spinning rollers and the tail stock moving means are at such time easily adjusted, and initial adjustments of the same and other parts'of the machine are easily made.

The compressed air equipment for the apparatus includes an air compressor I21 delivering thus subject to the pressure of the confinedmass of compressed air contained in the cylinder N0,

the pipe and tube means I34 and the tank I33.

The head stock spinning die head 21 includes a frusto-conical face 21I for forming one side flange of a V-groove pulley, and also includes a pilot 212 which is adapted to fit into and be received by a pilot socket I25--I provided in the tail stock spinning die head I25.

The tail stock spinning die head I25 has a frusto-conical face I20-2 for forming the other side flange of a V-groove pulley.

The rough spinning roller I05 has a wedge shaped o'uter annular periphery with a relatively blunt curved apex for initially forming a groove between the frusto-conical faces 21-I and I26--2 of the'opposed die heads 21 and I25.

The finish spinning roller I04 has a formed outer annular periphery corresponding to the inner cross section of the finished pulley.

In the operation of the improved roller spinning apparatus I0 to carry out the improved method hereof, a partially formed annular tubular pulley I30 including a wheel disk I36 and a tubular annular flange I31 extending laterally from the disk is formed from a sheet orstrip of preferably rolled steel, preferably by draw pressing operations.

The partially formed pulley I has a central aperture I33 therein which fits over the pilot pin 212 as best shown in Fig. 3.

With the parts of the automatic spinning lathe in the relative positions shown in Figs. 1 and 3, the partially formed pulley I35 is inserted upon the spinning die head 21 after which the'tail stock carriage I01 moves by operation of the cam 43 towards the head stock, and the tail stock spinning die head I25 abuts against the wheel disk I30 as shown in Fig. 2, with a displacement of the piston I23 from the adjacent end of the sleeve H0 against the confined mass of com-. pressed air in the cylinder 1 I3.

The cam, link, and lever cross feed means 51 for the rough spinning roller means I3 then commence to operate to advance the rough spinning roller I00 from the retracted position as shown in Fig. '1 to the spinning position between the die heads shown in Figs. 8 and 10 wherein the rough spinning roller I0! is rolling the partially formed groove I33 in the tubular flange I31 of the partially formed pulley I30.

The cam, link, and lever cross feed means 51 r 9,002,415 then operate to'retract the rough spinning roller ill fro between the die heads 21 and iii.

The am, link, and lever cross feed means ll now operate to advance the finish spinning roller I04 into the partially formed groove I to finish spin the desired V-pulley, and the piston I23 advances towards the adjacent end of the sleeve III, the tail stock spinning die head clamping the wheel disk I" against the adjacent end of the head stock spinning die head 21 as shown in Fig. 11.

The cam, link, and lever cross feed means I6 then retract the finish spinning roller IN to the initial position as shown in Fig. '7, and the tail stock carriage iil'l is retracted to its initial position as shown in Figs. 1' and 3.

In such position, the finished V-pulley may be removed from the spinning die head 21 and another partially formed pulley I35 placed therethe directions of motion of the moving compressive force and 'the moving roller spinning pressure, and automatically coordinating with respect to each otherthe movements of the compressive force and-the roller spinning pressure.

2. The method of roller. spinning an article of ductile material which includes rotating the article about an axis, applying upon the rotating article through a compressible medium a moving compressive force in the direction of the axis'of rotation, opposing said compressive force by another compressive force, and applying a moving roller spinning pressure upon portions of the article between the compressive forces, maintaining an angular relation-between the directions of motion of the moving compressive force and the moving. roller spinning pressure, and automatically coordinating with respect to each other the movements of the compressive force and the roller spinning pressure I 3. The method of roller spinning an article of ductile material which includes rotating. the varticle about an axis, applying upon the rotating article a moving compressive force in thedirection of the axis of rotation, opposing said comfpressive force by another stationary compressive force, and applying a moving roller spinning pressure upon portions of the article between the compressive forces, maintaining an angularrelation between the directions of motion of the I moving compressive force and the moving roller.

spinning pressure, and automatically coordinating with respect to each other the movements of the compressive force and the-roller spinning pressure.

'4. The method of roller spinning an article of ductile material which includes rotating the article about an axis, applying upon the rotating article through a compressible medium a moving compressive force in the directio'n of the axis of rotation, opposing said compressive force by an-,

other stationary compressive force, and applying a moving roller spinning pressure up n P tions of the article between the compressive forces, maintaining an angular relation between the directions of motion of the moving compressive force and the moving roller spinning pres-- sure, and automatically coordinatingwith respect to each other the movements of the compressive force and the roller spinning pressure.

5. Themethod of roller spinning a tubular article of ductile material which includes rotating the tubular article about an axis,'a'pplying upon one end of the tubular article a moving compressive force in the direction of the axis of rotation, opposing said compressive force by another compressive force applied against the other end of'the tubular article, and applying a moving roller spinning pressure upon outer portions of the tubular article between the ends thereof and the compressive forces, maintaining an angular relation between the directions of motion of the moving compressive force and the moving roller spinning pressure, and automatically coordinating with respect to each other the movements of the compressive force and the roller spinning pressure.

6. The method of roller spinning a tubular article of ductile material which includes rotatin the tubular article about an axis, applying upon one end of the tubular article through a compressible medium a moving compressive force in the direction of the axis of rotation, opposing said compressive force by another compressive force applied against the other end of the tubular article, and applying a moving roller spinning pressure upon outer'portlons of the tubular ar-'- ticle between the ends thereof and the compressive forces,,maintaining an angular relation between the directions of motion of the moving compressive forceandthe moving roller spin ning pressure, and automatically coordinating with respect to each other the movements of the compressive force and the roller spinning pressure.

"I. The method of roller spinning a tubulararticle of ductilematerial which includes retatingthe tubular article about an axis, applying upon one end of the tubular article a moving compressive force in the direction of the axis of rotation, opposing said compressive force by another stationary compressive force applied against the other endof thetubular article, and

outer portions of the tubular article between the ends thereof and the compressive'forces, maintaining an angular relation between the directions of'motion of the moving compressive force andthe moving roller spinning pressure, and automatically coordinating with respect to each other the movements of the compressive force and the roller spinning pressure.

8. The method of roller spinning a tubular "article of ductile material which includes rotating the tubular article about an axis, applying upon one end of the tubular article through a compressible medium a moving compressive applying a moving roller spinning pressure upon force in the direction of the axis of rotation, opposing said compressive force by another stationary compressive force applied against the other end of the-tubular article, and applying a a moving roller spinning pressure upon outer portions of the tubular article between the ends thereof and the compressive forces, maintaining an angular relation between the directions oi motion of the moving compressive force and the moving roller spinning pressure, and automatig as roller spinning pressure.

9. Apparatus ior roller spinning and the like,

including opposed rotatable die heads, means ior rotating one oi the die heads, means for movme one of the die heads towards and away from the other die head, a spinning roller operatively mounted at one side of the axis 01 rotation of the die heads and between the opposite end planes oi the die .heads at right angles to the axis of rotation, means for moving the spinning roller towards and away from the axis of rotation of the die heads and rolling position between the-die heads, and means for operating the moving means for the die head and the moving means for the spinning roller in co-ordination with respect to the movements 01 each other.

10. Apparatus for roller spinning and the like, including opposed rotatable die heads, means for rotating one of the die heads, means slidably mounting one or the die heads including a member movable with the die head towards and away from the other die head, a confined mass of compressible medium interposed between the movable member and the die head slidably mounted thereby. a spinning roller located at one side of the axis of rotation of the die heads and between the opposite end planes of the die heads at right angles to the axis of rotation, a member Journal mounting the spinning roller and movably operative to move the spinning roller towards and away from the axis of rotation of the die heads and rolling position between the die heads, and means for operating the movable die head mounting member and the movable spinning roller mounting member so as to coordinate the movements oi the die head and the spinning roller with respect to each other.

11. Apparatus for roller spinning and the like,

' including opposed coaxial rotatable die heads,

means for rotating one of the die heads, means for moving one 01 the die heads towards and away from the other die head, a spinning roller operatively mounted at one side oi the axis of rotation of the die heads and between the opposite end planes of the die heads at right angles to the axis of rotation, means for moving the spinning roller towards and away from the axis of rotation 01' the die heads and rolling position between the die heads, and means for operating the moving means for the die head and the moving means for the spinning roller in co-ordination with respect to the movements of each other.

12. Apparatus for roller spinning and the like, including opposed coaxial rotatable die heads, means for rotating one of the die heads, means slidably mounting one of the die heads including a member movable with the die head towards and away from the other die head, a confined mass of compressible medium interposed between the movable member and the die head slidably mounted'thereby, a spinning roller located at one side of the axis otrotation oi the die heads and between the opposite end planes of the die heads at right angles to the axis of rotation, a member journal mounting the spinning roller and movably operative to move the spinning roller towards and away from the axis of rotation of the die heads and rolling position between the die heads, and means for operating the movable die head mounting member and the movable spinning roller mounting member so as to co-ordinate the movements of the die head and the spinning roller with respect to each other. 7

WILLIAM R. HARRISON. 

